I love this game but there's one small thing that I keep wishing for every time I play: an indicator of how long the bullet power-up is active. It took me a while to realize that the bonus operated on a timer rather than on how many bullets you fired. So, some sort of aura about the ship or something while it is active would be great.

Yes please . there are times when i get the ammo but have no ships to shoot at , then 5 secs later ships arrive and ammo power gone without using it .

Yes please. And maybe it should be changed to ammo....but that's just me :/